Well better be careful on that account then. When you look at most of the famous comedy duos its' almost a truism that the real-life roles are reversed. So with Rowan and Martin, Lewis and Martin, the Smothers Brothers et. all.
* it tends to be the one who 'plays dumb' Tommy, Jerry Lewis, and Dick Martin were the main writers, the business-person, and holder of the artistic vision.
* - Doesn't work with Burns and Allen. That's because Gracie was just pure comedy genius straight from god's lips to everyone's ears. And the final version (Burns as straight-man to Gracie) was a reversal of the original act.
Here they are doing one of the older vaudeville routines for TV. This is what comedy was like before ADD.
Burns and Allen - Uncle Otis